Re: [Xen-users] xl network-attach

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Wed, May 18, 2016 at 01:12:39PM +0000, 席康杰 wrote:
> Hi,
> 
> 
> 
> I use ‘xl network-attach’ to attach a nic, but failed.
> 
> 
> 
> # xl -vvv network-attach 6028 mac=00:16:3e:eb:ca:81 bridge=virbr0

As a starter, can you try:

 xl -vvv network-attach 6028 "mac=00:16:3e:eb:ca:81,bridge=virbr0"

ISTR there is a problem with command line argument parsing and even
wrote a patch series for it.

Worth trying anyway.

> 
> libxl: debug: libxl.c:4247:libxl_device_nic_add: ao 0x20a9190: create: 
> how=(nil) callback=(nil) poller=0x20a91f0
> 
> libxl: debug: libxl_event.c:577:libxl__ev_xswatch_register: watch w=0x20a5948 
> wpath=/local/domain/0/backend/vif/6028/0/state token=3/0: register slotnum=3
> 
> libxl: debug: libxl.c:4247:libxl_device_nic_add: ao 0x20a9190: inprogress: 
> poller=0x20a91f0, flags=i
> 
> libxl: debug: libxl_event.c:514:watchfd_callback: watch w=0x20a5948 
> wpath=/local/domain/0/backend/vif/6028/0/state token=3/0: event 
> epath=/local/domain/0/backend/vif/6028/0/state
> 
> libxl: debug: libxl_event.c:834:devstate_watch_callback: backend 
> /local/domain/0/backend/vif/6028/0/state wanted state 2 still waiting state 1
> 
> libxl: debug: libxl_event.c:514:watchfd_callback: watch w=0x20a5948 
> wpath=/local/domain/0/backend/vif/6028/0/state token=3/0: event 
> epath=/local/domain/0/backend/vif/6028/0/state
> 
> libxl: debug: libxl_event.c:830:devstate_watch_callback: backend 
> /local/domain/0/backend/vif/6028/0/state wanted state 2 ok
> 
> libxl: debug: libxl_event.c:615:libxl__ev_xswatch_deregister: watch 
> w=0x20a5948 wpath=/local/domain/0/backend/vif/6028/0/state token=3/0: 
> deregister slotnum=3
> 
> libxl: debug: libxl_event.c:629:libxl__ev_xswatch_deregister: watch 
> w=0x20a5948: deregister unregistered
> 
> libxl: debug: libxl_device.c:1028:device_hotplug: calling hotplug script: 
> /etc/xen/scripts/vif-bridge online
> 
> libxl: debug: libxl_aoutils.c:513:libxl__async_exec_start: forking to 
> execute: /etc/xen/scripts/vif-bridge online
> 
> libxl: debug: libxl_event.c:629:libxl__ev_xswatch_deregister: watch 
> w=0x20a59d0: deregister unregistered
> 
> libxl: debug: libxl_device.c:1028:device_hotplug: calling hotplug script: 
> /etc/xen/scripts/vif-bridge add
> 
> libxl: debug: libxl_aoutils.c:513:libxl__async_exec_start: forking to 
> execute: /etc/xen/scripts/vif-bridge add
> 
> libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus: 
> /etc/xen/scripts/vif-bridge add [-1] exited with error status 255
> 

This is the culprit.

> libxl: debug: libxl_event.c:629:libxl__ev_xswatch_deregister: watch 
> w=0x20a59d0: deregister unregistered
> 
> libxl: debug: libxl_event.c:629:libxl__ev_xswatch_deregister: watch 
> w=0x20a59d0: deregister unregistered
> 
> libxl: error: libxl.c:1965:device_addrm_aocomplete: unable to add vif with id > 0
> 
> libxl: debug: libxl_event.c:1765:libxl__ao_complete: ao 0x20a9190: complete, 
> rc=-3
> 
> libxl: debug: libxl_event.c:1737:libxl__ao__destroy: ao 0x20a9190: destroy 
> libxl_device_nic_add failed.
> 
> xc: debug: hypercall buffer: total allocations:26 total releases:26
> 
> xc: debug: hypercall buffer: current allocations:0 maximum allocations:2
> 
> xc: debug: hypercall buffer: cache current size:2
> 
> xc: debug: hypercall buffer: cache hits:20 misses:2 toobig:4
> 
> 
> 
> # xl network-list 6028
> 
> Idx BE Mac Addr.         handle state evt-ch   tx-/rx-ring-ref BE-path
> 
> 0   0  00:16:3e:eb:ca:81     0     1     -1    -1/-1          
> /local/domain/0/backend/vif/6028/0
> 
> 
> 
> # brctl show
> 
> bridge name     bridge id               STP enabled     interfaces
> 
> virbr0          8000.feffffffffff       no              vif6028.0
> 
> 
> 
> If succeed to attach，’brctl show’ will output:
> 
> bridge name     bridge id               STP enabled     interfaces
> 
> virbr0          8000.feffffffffff       no              vif6028.0
> 
>                                                   vif6028.0-emu
> 
> 
> 
> # cat /var/log/xen/xen-hotplug.log
> 
> Cannot find device "vif6028.0-emu"
> 

This is strange...

Let me try to test this functionality a bit.

Wei.

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